__________Applications Information

Operation with Supply Voltages

Other than ±15V

Using supply voltages other than ±15V reduces the

analog signal range. The DG406/DG407 switches oper-

ate with ±4.5V to ±20V bipolar supplies or with a +4.5V

to +30V single supply; connect V- to GND when operat-

ing with a single supply. Also, both device types can

operate with unbalanced supplies such as +24V and

-5V. The Typical Operating Characteristics graphs

show typical on-resistance with 20V, 15V, 10V, and 5V

supplies. (Switching times increase by a factor of two

or more for operation at 5V.)

Overvoltage Protection

Proper power-supply sequencing is recommended for

all CMOS devices. Do not exceed the absolute maxi-

mum ratings because stresses beyond the listed rat-

ings may cause permanent damage to the devices.

Always sequence V+ on first, then V-, followed by the

logic inputs and analog signals. If power-supply

sequencing is not possible, add two small signal

diodes in series with supply pins for overvoltage pro-

tection (Figure 1). Adding diodes reduces the analog

signal range to 1V above V+ and 1V below V-, but low

switch resistance and low leakage characteristics are

unaffected. Device operation is unchanged, and the

difference between V+ and V- should not exceed +44V.

Improved, 16-Channel/Dual 8-Channel,

CMOS Analog Multiplexers

6

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Bidirectional Output

D

28

Address Inputs

A3–A0

14–17

Enable Inputs

EN

18

Bidirectional Analog Inputs

S1–S8

19–26

Negative Supply Voltage Input

V-

27

Ground

GND

12

Bidirectional Analog Inputs

S16–S9

4–11

DG406

PIN

No Internal Connections

N.C.

2, 3, 13

Positive Supply Voltage Input

V+

1

FUNCTION

NAME

Negative Supply Voltage Input

V-

27

Bidirectional Output A

DA

28

Ground

GND

12

Address Inputs

A2, A1, A0

15, 16, 17

Enable Input

EN

18

Bidirectional Analog Inputs

S1A–S8A

19–26

Bidirectional Analog Inputs

S8B–S1B

4–11

No Internal Connection

N.C.

3, 13, 14

DG407

PIN

Bidirectional Output B

DB

2

Positive Supply Voltage Input

V+

1

FUNCTION

NAME

_____________________________________________________________Pin Descriptions

S

D

V-

V+

Figure 1. Overvoltage Protection Using External Blocking

Diodes